Carbureter.



" an PATE OFFICE.

cars a runnnnnuaia, or nmnommiomem, ass onon, To nnrno r LUBBICATOR oomram,'ornnrnom, momma, A oonronarxon or MICHIGAN: l

neonates, 1

To all wlwm'it'may 0mm; .r v, j

Be it known that I, .O'ris C, F NDnnBUnK, a citizen of the United Statesof America,

residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements inCa-rbureters, of which the followingis a specification, reference being had therein to the accompanying drawings.

The invention relates to carbureters of; that type in which the discharge of the 011 is normally controlled by an adjustable metering pin.

It is one of the objects ofthe invention to obtain an improved construction ofadjustment means for the metering pin.

It is a further objectto ,provide auxiliary means for increasing the discharge of 0'11;

upon the sudden opening of the throttle, and still further to obtain aconstruction in which the carburetor automatically adjusts itself to the loadindependent of the speed of the engine.

In the drawings, Figure 1 is a longitudinal section through a carburetor; and Fig. 2 is a sectional elevatlon at rlght angles to Fig.1. r v P -A is a casing having a lower P01131011 forming an air inlet chamberB and an up per portion having'the mixing chamber (3,

preferably of pear-shaped form; ,Arranged concentrically within the chamber B is a cylinder D in whicli is slidinglysecureda hollow piston E having the chamber F therein. r I i p Gris a valve se ured to the, upper end of the piston E and adapted to rest" upon a seat air cannot enter said chamber without lift- I H for closing the, secondary air inlet between the chamber B and the inixing-cham- J to enlarge the openlngaround the meterber C. I I

1 1S a nozzle arranged concentrically within the piston E and having ts npper end ing flared. The portion of, thegval-ve :G underlying the chamber G has screw;-

threadedconncctionwith the piston, the 1 nozzle I being snugly passed through said portion. Below the upper end of=v th'e nozzle, the chamber G" has commun cat on with a plurality of primary air passages; H,

which at their other extremitiesfopen into the air inlet chamber B.

J is a tube depending fromthe plston E i CARBUZRETER.

Specification of Letters Patent.

, Patented Nov.14,.1916.': Application n an'a 11, 1914; Serial naasaaoz.

ing into a" well or recess K in the lower portion of the casing,A,jwhich well'is connected by a passage L'withthe float chamber M'.

N isthe. metering pin which is suitably tapered and projects upward into the de-q Ipe'nding tube J to restricttheinlet. This of said rock-arn for engaging a stop Q upon the casing A. h

Withv 1 he arrangement as 1 thus far de scribed,,th e o'ylsupplied from the float chamber fill s the well K and enters the noz N serves. to variablyurestrict the opening into the tubeJJ and may bese for minimum opening-by an adjustment o the screw Qf which ngagias'the stopQfl \As the tube J depends from the pistonE and as the latter Q and Q isan adjustable screw at the end in is connected with the valve G, it is evident that where the latter,valveislifted by suc tion in ,t hechamber C the tube J will be also I lifted, thereby enlargingthe opening around the metering pin so astoypermit. a, greater quantity of oil to be dischargedfrom the; nozzle.

The constructionojust described will, under normal conditions, malntalnald scharge of oil proportionate to the-quantity of air passin'gthrough the mixing chamber, as. the

opening of the throttlev R, the ,valve G is frequently thrown violently; upward to the lim t of its nov'einent and thenerebounds to 1 1.

a partially closed position before the, oil

column can be set inwmotion 'As this would result in, a lean mixture,il have provided auxiliary means for increasing the discharge of oil which is operated by, a'sudden i.

movement of the {valve G, ,i This auxiliary means, as specifically shown, comprises a tube S withinthe hollow ,piston E, which at its lower end communicates with an opening through the wall of said piston, connecting with an annular channel E around the pe;

in alinementwiththe nozzle I and extend:

riphery of the piston. .The tube S exten'ds upward within the chamber F to a point above the normal hydrostatic level of' the oil. T is a tube also within the chamber F in the hollow piston, the lower end of which communicates'with an opening through the bottom wall of the piston. U is a port in the nozzle I at thebottom of the chamberF. With the construction just 'described wheneverthe. valve G is moved suddenlyupward, as'by the sudden opening of the throttle R, the piston E will belifted and the suction produced by its displacement will 'be' communicated throu h the tube P to the chamber F, where it wi 1 lift the oil in the tube S untilitoverflows the up er end of I said tube and fills the c'upshaped ottom of the chamber F. This will permit the oil to pass through the port U into the nozzle I above the metering pin, so that an increased discharge of oil from said nozzle is obtained.

Where, as in the case of a vehicle running upon a level road, the throttle is opened for the purpose of increasing the speed, the increased air velocity will automatically ope crate the air valve G and through it,-c0 n- 'trol the adjustment of the metering N;

On the other hand, there are occasions when the speed will be retarded while the throttle] remains open, as for instance wherethe ye- 'hicle is climbing a bill; This would result" in a decreased velocity of air passing.

through the mixing chamber and the conse-' quent lowering of the air valve G, which in turn would effect the metering pin adjust ment to decrease the quantity of oil. Itis, however, desirable to prevent this decrease in the oil supply, as the engine is 0 rating under heavy load, and I have there ore provided the following means for automatically accomplishing such a result, Whenever the air valve Gr is lifted and maintained open for a short interval, the leakage of oil sis so asto' maintain or crease in load which tends to check the speed-of the engine will automatically in creasertherichness of the explosive charge increase the power of the engine.

What I claimas my invention is; 1 1. In a carbureter, the combinationwith a casing containing a mixing chamber, of a jsaid cup. w v I K 5 .I n a carbureter, the combinationwith erasing containing a-mixing chamber, of

valve controlling the air inlet: into said chamber, a nozzle for discharging oil into said chamber, a well normallysupplying oil 'tothe nozzle, an auxiliary cup for-an auX-' ihary supply of 01.1 communicating with said nozzle, and'means-operated by a movement of said val ieforv filhng said cap with 011. 2. In a carbureter, the comb nation with a casing conta ning a mixing chamber, of a nozzle or dischar mg 011 into said Cl'lilllk' her, a wellnorma ly supplying oil to the nozzle, an auxiliary cup for supplying oil to said nozzle, and meansotherthan. gravity operating uponaflchange in the velocity lot air passing through said chamberfor filling said cup withoiL- 3. In a carbureter, thecombination with a casing containing a mixing chamber, of

a nozzle for discharging oil intosaid chain ber, means for normally supplying ,oil to said nozzle, a cup for an auxiliary oil supply to said nozzle, and automatic mechanism operating upon a change OfYQlOCltlV of air passing through said chamber for filling said cup. v I r y 4. In a carbureter,the combination with a casing containinga m xing chamber, of a nozzle for discharging oil into saldcham-u her, a valve in the air inlet for said chamher, a well normally supplying oil to the nozzle an auxiliary cup for supplying oil to said nozzle, and' means operatingu on a I sudden movementof} said valve for lling a nozzle for discharging oil into said cliainher, a valve controllingthe air inlet into said chamber, meanslnormally operated bythe 'movement of suid' valve for varying the supply of oil to said nozzle, a cup for an additional "supply of oilto' said nozzle, and

means operating upon a sudden movement of said valve for filling said cup. 6. In is carbureteigthe combination with a casing containing an airmixing chamber of a valve controlling the air inlet to said ;hamber, a nozzle for dischargingoil into said chamber, a wellnorm'ally supplyin oil to the nozzle, 1a hollow pistonrsurroun ing said nozzle forming acupfor an auxiliary supply of oil,nsaid piston being connected to said valve, a cylinder in which saidpiS-f ton is located, and means operated byithe displacementof said plstonin said cylinder for fillingsaid cup with oil.

7. In a carbilreter, the combination with a casing containinga mixing, chamber, of a. valve controlling the air inlet to said chamher, a hollow piston connected to said valve,- 'an oil nozzle passing throughsaid hollow piston and ha'vingcommunicatiom with the chamber therein, a well normally supplying oil to the nozzles. cylinder containing sa-idpiston, and means operating upon the slid inder for filling the chamber of the piston with oil. I

8 In a carburetor, the combination with a casing containing a mixing chamber, o'fa valve controlling the air inlet to said chamher, a hollow piston connected to said valve, a nozzle for discharging oil into said mix ing chamber arranged centrally within said hollow piston and having lateral communi-- cation with the chamber therein, a cylinder in which said piston is located, a peripheral oil supply connection to said cylinder, a tube connecting with said peripheral oil supply' extending upward in the chamber within said piston to a point above the normal liynozzle for conducting oil into said chamber? drostatic level of the oil, and a tube having communication with an opening through the lower end of said piston extending. upward within said hollow chamber to a point above the normal hydrostatic levelof the oil,

' whereby a sudden displacement of'said-piston in either direction will cause an overflow of oil into the piston chamber.

9. In a carburetor, the combination with a casing containing a mixing chamber, of a valve controlling the air inlet to said chamher, a hollow piston connected with said valve, a nozzle for discharging oil into said chamber extending upward within said 1101: low piston and having lateral communication with the chamber therein, a cylinder in which said piston is located having a restricted peripheral clearance, a peripheral supply connection for oil to said cylinder, and ducts extending respectively from the periphery and from the bottom of said pis ton to a point within said hollow chamber above the normal hydrostatic level of the oil, for the purpose described.

10. In a carbureter, the combination with acasing'containing a mixing chamber,'an air inlet connection beneath the same and a cylinder arranged within said air inlet con: motion}, of a valve for closing said airinlet connec ion, a hollow piston within s aid c'ylinder connected to saidvalve, a nozzle for disch'argingml into said mixing chamber ar-,

ranged centrally within said hollowpiston and having lateral communicat1on w1th 'thc chambbr therein, means for supplying Oil to the lower end of said'nozzle, a metering pin controlling the admission of oil to said nozzle to vary the same upon, a movement of said piston, means for supplying oil to said cylinder, and a duct extending from said oil supply to a point within said hollow piston. above the normal hydrostatic level of the oil, through which oil is supplied to the chamber within the piston upon asudden displacement of the latter.

11. In a carburetor, the combination with a casing containing a mixing chamber, an air inlet passage thereto and an oil supply well at the lower end thereof, of a valve conwith said v inlet for an aniriliary supply of oil.

"with said'valve, a cylinder within'which th ,.munication being established between-. 'the formed with primary andiauxiliary oil in lets, the latter commun cating with thalo'wer source of oil supplyu trolling said air inlet, a piston connected lve engaging said 'cylimler, a nozzle for r scharging oil into said mixing chambercarried by said piston and depend} mg into said well, a metering pin in said do well engaging the lower end of said nozzle,

a head fiir adjusting said metering pin slidably engaging the wallsof said well and am; nu'larly grooved-to form a rack, a pinion for U engaging said rack, and an adjustable shaftfi for actuating said pinion to vary the p'osi tion of adjustment of said metering pin, the

,head being formed with an opening to re-l ceive the lower end of said nozzle. I v l 2. In a carburetenthe comb nation with so a casing containing a mixing chambeiyof a" means for normally supplying'oil to the 1102- zle, an auxiliary cup for supplying oil to c I the nozzle, and meansoperating upon a sud den rise or fall in pressure inthe mixing a chamber for filling said cup a 13. In a carburetor, the combination'with' a casing containing a mixing chamber,- of nozzle for discharging oil into said chambe a valve controlling the air inlet to said clrainher, means normally actuated :by afniove fl ment ofsaid valve for varying the supply, of oil to thenozzle, and meansoperatingnpo a sudden'increase or. decrease of pressure in the mixing chamber for fillingsaid cup. 1 31 14. In a carburet'er,.the combinationiwithft a casing formed with'a mixing chambenof a valve controlling the air inlet'to said-chum her, a nozzle for discharging oil intosaidgi chamber,having a primary 'oilinlet at one"! extremity controlled by normal movement 0 the valve, and formed with an intermediat,

15. In a carbnreter, the combination with 1 a casing fpiimedwith a mixing-chamber, of" a' valve "controlling the air; inletlto said. chamber, a hollow piston rigidlyconnectedpiston is mounted for reciprocation, scorn" space .-,within the cylinder underlying jth piston and thenpper portion of t within the piston, a nozzle ending through the-piston having an outlet foij' df charging oilintotthe mixing chamber, and

portion -.of the piston chamber, and a source of oil supply having an outletcommu'nh eating with the upper portion of the piston chamber, whereby a sudden displacementot the piston in either direction willcause-an overflow-into the piston chamber fromthe" 16. In a carburetor, the combination with a casing formed with a mixing.charnber, .of a valve controlling the air inlet to said chamber, a hollow piston rigidly connected with said valve, a cylinderwithin which 1 is for reeip communication being established piston and the upper portion of the piston chamber,

a nozzle extending through the piston having an outlet for discharging oil into the mixing chamber and formed with primary and'auxiliary oil inlets, the latter communicating with the lower portion of the piston chamber, a, peripheral oil supply connection to said cylinder and a tube con necting with said peripheral oil supply extending upwa'rd within the piston chamber to a point above the normal hydrostatic level of the oil, whereby a sudden displacement of the piston in either direction will cause an overflow of oil into the piston chamber.

17. In a carbureter, the combination with a containing a mixing chamber, of a valve controlling t e air inlet to said chamber, a hollow pidon connected with said valve, a cylinder in which the iston is located, having restricted perip eral clearance, communication being established between the space underlying the piion within the cylinder and the upper portion of the piston interior, a nozzle extending through the piston having an outlet for discharging oil into the mixing chamber, and formed with primary and auxiliary oil inlets, the latter communicating with the lower portion of the piston interior, and a source of oil supply having communication with the upperportion of the piston interior where by a sudden displacement of the piston in either direction will cause an overflow in to the piston chamber from said source of oil supply." D

18. In a carburetor, the combination with a casing containin a mixing chamber, of a valve controlling t e air inlet to said chamber, a hollow pidoi; connected with said valve, a cylinder in which the piston is located, poitions of the piston and cylinder being spaced from each other to form an oil reservoir, a restricted peripheral clearance rovided between the pidon and cylinder iom the oil reservoir downward, communication being established between the space underlying the piston and the upper portion of the tending through the piston'having an outlet for disch arging oil into the mixing chamher, and formed with primary and auxiliary inlets, the latter communicating with the mittent motion actuated by chan piston interior, a nozzle ex-- 19. In a carburetor, the combination with,

a casing containing a mixing chamber, of a valve controlling the air inlet to said chamher, a nozzle for discharging oil into said chamber, a well normally supplying oil to the nozzle, an auxiliary oil supplycup cominunicatingwith the nozzle, an oil reservoir having an outlet to said cup above the normal hydroaatic level-0f the oil, and means operated by a movement of said valve for lowering the hydrostatic pressure within the auxiliary oil supply cups, producin an overflow from the oil reservoir into cup.

20. In a carbureter, the combination with a casing containing a mixing chamber, of a nozzle for discharging oil into said chamber,

.ber, means for normally supplyin oil to the nozzle, a cup for an auxiliary oi supply to' said nozzle, a member subjected to an interin the velocity of air pasing through e mixin chamber, and means dependent upon sai motion for delivering an auxiliary supply of oil to said cup.

In testimony whereof I afix in presence of two witn OTIS C. FUNDE RBURK.

lVitneSes:

Jaime P. BARRY, 'Hrxamrra E. Bowman.

my signature a well normally supplying oil to the nozzle, an auxiliary oil supply; cup com-- in the velocity of- 

